Remove API controller

This is pretty trivial, doesn't work and seems to be generally
unfinished.
document adding a new translation
Correct setting of came_from when unset before (Closes #385)
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge pull request #383 from nidico/remove-api-controller

Remove API controller
Merge pull request #386 from liqd/doc-new-translation

document adding a new translation
Correct OpenID error messages.

In b688bba810ed3c9efbaff94a28919be29c23838f, we changed the OpenID error messages by accident. Undo that.
Update translation templates
Update German translation (Fixes hhucn/adhocracy.hhu_theme#129)
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Merge remote-tracking branch 'liqd/develop' into develop
Merge branch 'develop' of https://github.com/liqd/adhocracy into develop
Do not linkify vote count if vote details are hidden

See hhucn/adhocracy.hhu_theme#288 for details
Update German translation
check_port_free: Inherit from Exception instead of BaseException

See http://docs.python.org/2/library/exceptions.html#exceptions.BaseException for the rationale.
Inline login (Closes #352)

With came_from being set in the URL, this is actually fairly simple.
Major thanks go to @SysTheron for preparing the commit and being on the ball about it.
If browser is IE7 or older, user is getting a message to please update the browser
Standard string must be english of course
Bumped font, changed text, fix for IE6
Merge pull request #389 from carschroeder/ie-message

Warning message if browser is IE7 or older